#--
# Copyright (c) 2007 Maximilian Ott
# 
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
# 
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
# 
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#++
#
#
# This calss defines all the filter elements pertinent
# to this spplication
#
#require 'models/filter_element'

class AppFilterElement < FilterElement
  
  # Start with a clean slate.
  self.reset_filter_definitions
  
  filter :student, :text, :human => 'with name' do |f, e|
    val = e.text_val
    unless (val.nil? || val.empty?)
      tname = "t#{e.position}"
      f[:conditions] << e.op if f[:conditions].size > 0
      f[:from] << "people as #{tname}"
      l = "LIKE '%#{val}%'"
      f[:conditions] << "(#{tname}.name_family #{l} OR #{tname}.name_family #{l})"
      f[:conditions] << "AND students.person_id = #{tname}.id"
    end
  end
  
  filter :project, :string, :human => 'in project', :table => 'students'
  filter :laboratory, :string, :human => 'in laboratory', :table => 'students'
  filter :research_theme, :string, :human => 'in theme', :table => 'students'
  filter :university, :string, :human => 'in university', :table => 'students'
  
#  filter :published_at, :time_span, :human => 'published' do |f, e|
#    unless e.from.nil? && e.to.nil?
#      f[:conditions] << e.op if f[:conditions].size > 0
#      both = (e.from != nil && e.to != nil)
#      f[:conditions] << "(" if both
#      f[:conditions] << "publications.published_at > '#{e.from}'" unless e.from.nil?
#      f[:conditions] << "AND" if both
#      f[:conditions] << "publications.published_at < '#{e.to}'" unless e.to.nil?
#      f[:conditions] << ")" if both
#    end 
#  end
end  
